Warning light base



FIG. 1 is a perspective view of a warning light base showing the new design;

FIG. 2 is a front elevational view thereof, the opposite, rear elevational view being the same as FIG. 2;

FIG. 3 is a is a side elevational view thereof, the opposite side elevational view being the same as FIG. 3;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a perspective view thereof with a lense assembly shown in broken lines.

The broken lines immediately adjacent to the shaded areas in FIG. 5 represent the bounds of the claim. None of the broken lines form part of the claimed design. 

The ornamental design for a warning light base, as shown and described. 